spark Experimental 源码
spark Experimental 代码
文件路径：/common/tags/src/main/java/org/apache/spark/annotation/Experimental.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.annotation;
import java.lang.annotation.*;
/**
* An experimental user-facing API.
*
* Experimental API's might change or be removed in minor versions of Spark, or be adopted as
* first-class Spark API's.
*
* NOTE: If there exists a Scaladoc comment that immediately precedes this annotation, the first
* line of the comment must be ":: Experimental ::" with no trailing blank line. This is because
* of the known issue that Scaladoc displays only either the annotation or the comment, whichever
* comes first.
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER,
ElementType.CONSTRUCTOR, ElementType.LOCAL_VARIABLE, ElementType.PACKAGE})
public @interface Experimental {}
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